Google I/O has certainly been good to Google's stock price. After today's opening day of Google I/O, Google's stock closed at a record high of $909.38, only to raise a further $2.81 in after-hours trading. The stock price currently sits at $918.70, the highest the stock has ever been.

It was just three months ago that Google's stock originally crossed the $800 mark. In the time between then and now, not much has happened. The company hasn't really announced anything revolutionary or new, though Glass Explorer Edition has been handed out to developers. Apple's stock, meanwhile, fell 3.38 percent.